1 files changed, 107 insertions, 0 deletions
diff --git a/lib/FormatAbstract.php b/lib/FormatAbstract.php
new file mode 100644
index 00000000..e4a911c1
--- /dev/null
+++ b/lib/FormatAbstract.php
@@ -0,0 +1,107 @@
+<?php
+require_once(__DIR__ . '/FormatInterface.php');
+abstract class FormatAbstract implements FormatInterface{
+    const DEFAULT_CHARSET = 'UTF-8';
+
+    protected 
+        $contentType,
+        $charset,
+        $items,
+        $extraInfos
+    ;
+
+    public function setCharset($charset){
+        $this->charset = $charset;
+
+        return $this;
+    }
+
+    public function getCharset(){
+        $charset = $this->charset;
+
+        return is_null($charset) ? self::DEFAULT_CHARSET : $charset;
+    }
+
+    protected function setContentType($contentType){
+        $this->contentType = $contentType;
+
+        return $this;
+    }
+
+    protected function callContentType(){
+        header('Content-Type: ' . $this->contentType);
+    }
+
+    public function display(){
+        echo $this->stringify();
+
+        return $this;
+    }
+
+    public function setItems(array $items){
+        $this->items = array_map(array($this, 'array_trim'), $items);
+
+        return $this;
+    }
+
+    public function getItems(){
+        if(!is_array($this->items))
+            throw new \LogicException('Feed the ' . get_class($this) . ' with "setItems" method before !');
+
+        return $this->items;
+    }
+
+    /**
+    * Define common informations can be required by formats and set default value for unknow values
+    * @param array $extraInfos array with know informations (there isn't merge !!!)
+    * @return this
+    */
+    public function setExtraInfos(array $extraInfos = array()){    
+        foreach(array('name', 'uri') as $infoName){
+            if( !isset($extraInfos[$infoName]) ){
+                $extraInfos[$infoName] = '';
+            }
+        }
+
+        $this->extraInfos = $extraInfos;
+
+        return $this;
+    }
+
+    /**
+    * Return extra infos
+    * @return array See "setExtraInfos" detail method to know what extra are disponibles
+    */
+    public function getExtraInfos(){
+        if( is_null($this->extraInfos) ){ // No extra info ?
+            $this->setExtraInfos(); // Define with default value
+        }
+
+        return $this->extraInfos;
+    }
+    
+    /**
+     * Sanitized html while leaving it functionnal.
+     * The aim is to keep html as-is (with clickable hyperlinks)
+     * while reducing annoying and potentially dangerous things.
+     * Yes, I know sanitizing HTML 100% is an impossible task.
+     * Maybe we'll switch to http://htmlpurifier.org/
+     * or http://www.bioinformatics.org/phplabware/internal_utilities/htmLawed/index.php
+     */
+    protected function sanitizeHtml($html)
+    {
+        $html = str_replace('<script','<&zwnj;script',$html); // Disable scripts, but leave them visible.
+        $html = str_replace('<iframe','<&zwnj;iframe',$html);
+        $html = str_replace('<link','<&zwnj;link',$html);
+        // We leave alone object and embed so that videos can play in RSS readers.
+        return $html;
+    }
+
+    protected function array_trim($elements){
+        foreach($elements as $key => $value){
+            if(is_string($value))
+                $elements[$key] = trim($value);
+        }
+        return $elements;
+    }
+}